[X86] Correct the Defs, Uses, hasSideEffects, mayLoad, mayStore for XCHG and XADD instructions.
I don't think we emit any of these from codegen except for using XCHG16ar as 2 byte NOP. llvm-svn: 330298
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I don't think we emit any of these from codegen except for using XCHG16ar as 2 byte NOP. llvm-svn: 330298